IPLense

Claude China User Check

See the region the Claude domain sees, and the China signals in your browser.

Check your network and browser

Testing…

Claude China User Check

Testing…
Network region
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Matched factors
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Coverage
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How the Claude China User Check works

  1. Ask Claude for the network region

    Each check requests claude.ai/cdn-cgi/trace once and reads the country or region Claude sees.

  2. Check the browser signals

    The current page checks the time zone, languages, Simplified Chinese fonts, and Chinese browser or device characteristics, and records Emoji rendering.

  3. Add up the weights

    Matched signals add their own weights into the “looks like a China user” percentage; Emoji rendering is recorded but not scored.

Reading the result

  • MatchedThe signal fits a China-region user and adds its weight.
  • No matchThe signal does not fit and adds nothing.
  • ObservedShown for reference and not scored.
  • No dataThe signal was not available this time; you can run the check again.

Frequently asked questions

What does this check look at?

This check compares the network region seen by Claude with the browser's time zone, languages, fonts, and device characteristics. Each check requests the Claude network region once. The other signals are checked on the current page.

Why can factors add points when the network is outside China?

Time zone, languages, Simplified Chinese fonts, and device characteristics appear separately, so other matches can still appear when the network region differs.

Why does the page say it cannot tell yet?

Claude did not return a network region for this run. You can run the check again.

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